Waxed-thread sewing-machine.



lNo. 7I5,43l. Patented Dec. 9, |902.

` P. SHATFGRD.

WAXED THREAD SEWING MACHiNE.

(Application Med Jan. 25, 1902.)

Ulu Medel.)

Www-555 INVENTUR QQQJ BMW l AKW UNITED STATES PATENT OFFICE.

PHILIP SHATFORD, OF DALMUIR, SCOTLAND, ASSIGNOR TO THE SINGERMANUFACTURING COMPANY, A CORPORATION OF NEW JERSEY.

WAXED-'THREAD SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 715,431, dated December9, 1902.

Application filed January 25, 1902. erial No. 91,178. (No modehl i ToLZZ whom t may concern:

Be it known that I, PHILIP SHATFORD, a citizen of the United Kingdom ofGreat Britain and Ireland, residing at Hope Park Terrace, Dalmuir,county of Dumbarton, Scotland, have invent-ed certain new and usefulImprovements in or Relating to Waxed- Thread Sewing-Machines, (for whichapplication for patent has been made in Great Britain, No. 5,726, datedMarch 19, 1901,) of which the following is a specification.

This invention relates to machines for sewing leather or other goodswith waxed thread, and has for its object to provide an attachment forheating the wax or the waxedthread and maintaining the latter at asuitable temperature until it practically reaches the needle, so thatthe loss'ot thread and interruption of the work due to hardening of theWax during stoppages of the sewing operation may not be liable tooccur.'

In the accompanying drawings, which illustrate the invention, Figure 1is a longitudinal elevation of a sewing-machine arm, showing theimproved attachment applied thereto. Fig. 2 is a plan, and Fig. 3 an endView, of Fig. 1. Fig. i is a plan of a modification hereinafter referredto.

The attachment consists of a box-like heating-chamber A, with a swing orother cover A secured to the head or face plate C of the sewing-machineclose to the needle-bar D and take-up lever I, the said chamber inworking with previously-waxed thread being as shown at Figs. 1, 2, and 3and is partially lled with Water, which is heated by a gas-jet, as E, orother means, so that the thread F, which is carried on a spool or reel Gwithin the chamber A, is maintained at the temperature of thewater-vapor, is kept soft, and becomes impregnated with the wax. Thespool or reel Gr is preferably metallic; but not being eX- posed t-o thedirect heat of the burner E may be of wood or like material, and it iscarried on a spindle G, which may be .fitted horizontally, vertically,or at an inclination in the chamber-A. The use of water in theheatingchamber A may, however, be dispensed with.

The thread F from the spool G may pass through an orifice in theheating-chamber A to a tension .device H, mounted on the heating-chamberA, and may pass thence through` a second tension device H', mounted onthe head or face plate C, thence through the eye of the take-up I, andthence to the needle D, and in order that its temperature may not fallby exposure to the air it is protected by an inclosing hollow cover J,hinged, as by a vertical pivot at J', to the heating-chamber A or to theface-plate or other part of the machine, the said hollow cover .I whenclosed, as shown in Figs. 1 and 2, aordlng a chamber inclosing thetension devices H and H and the take-up lever, so as to exclude accessof cold air to the waxed thread F, a gas-jetK being also provided belowthe said cover .I when desired to maintain the required temperatu rewithin the chamber afforded by said cover. The hinged. cover .I may bereadily swung aside, as shown in Fig. 3, when access to the tension andtake-up devices is desired, as in threading up the machine.

In working with thread which is waxed as the sewing proceeds theheating-chamber A is made to hold the wax, or a wax-box, such as isshown at Fig. 4f, is fitted therein and is Y maintained at the requiredtemperature either by the direct play upon the chamber of a gasjet or bywater contained in a false bottom or jacket heated by the jetE. The drythread F is led through a tension device H2 on the cover or lid A of thechamber, down through vthe wax in the wax-box L, and around a roller M,fitted on an arm or bracket N, extending from the cover or lid A to thebottom of the wax-box, and thence through a clearing-oriice O to theusual tension and take-up devices, the waxed thread F being inclosed bya cover in the manner hereinbefore described.

Having thus described my invention, I claim and desire to secure byLetters Patent- 1. In a wax-thread sewing-machine, an attachmentcomposed of a box-like heatingchamber carried upon-the head or faceplate of the machine, above the Work-plate, combined withmeans forheating said chamber, and a hinged hollow cover arranged above thework-plate and affording a chamber adapted to inclose the usual tensionand take-up devices through which the thread is led from saidheating-chamber of the needle.

IOO

2. In a wax-thread sewing-machine, an attachment composed of a box-likeheatingchamber carried upon the head or face plate of the machine, abovethe Work-plate, combined with means for heating said chamber, a hingedhollow cover arranged above the work-plate and affording a chamberadapted to inclose the usual tension and take-up devices through whichthe thread is led from said heating-chamber to the need1e,and means forheating the chamber aorded by said cover.

3. In a wax-thread sewing-machine, an attachment composed of a box-likechamber on the head or face plate of the machine, above the work-plate,combined with means for heating said chamber, a wax-receptacle in PHILIPSHATFORD. Witnesses:

WALLACE FAIRWEATHER, JN0. ARMSTRONG, Jr.

